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[1] Jin Zuquan, Sun Wei, Jiang Jinyang, et al. Damage of concrete attacked by sulfate and sustained loading [J]. Journal of Southeast University (English Edition), 2008, 24 (1): 69-73. [doi:10.3969/j.issn.1003-7985.2008.01.016]
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Damage of concrete attacked by sulfate and sustained loading()
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
24
Issue:
2008 1
Page:
69-73
Research Field:
Materials Sciences and Engineering
Publishing date:
2008-03-30

Info

Title:
Damage of concrete attacked by sulfate and sustained loading
Author(s):
Jin Zuquan1 2 Sun Wei1 Jiang Jinyang1 Zhao Tiejun2
1School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
2School of Civil Engineering, Qingdao Technological University, Qingdao 266033, China
Keywords:
concrete sulfate flexural load microstructure
PACS:
TU528.01
DOI:
10.3969/j.issn.1003-7985.2008.01.016
Abstract:
The damage processes of ordinary concrete and high strength concrete, attacked by solutions of 2.5%, 5.0% and 10%Na2SO4(mass fraction)are studied.And the effects of flexural loads with stress ratios of 25% and 50% of the initial flexural strength on the damage process of concrete are also investigated.The results show that the damage process of concrete attacked by sulfate salt exhibits an initial damaged stage, a performance improving stage and a performance worsening stage.When the concentration of Na2SO4 in a solution increases from 2.5% to 5.0%, the service time of the concrete decreases approximately 25%.Furthermore, it decreases to even 40% with an increase in a Na2SO4 concentration up to 10%.And the flexural load accelerates the deterioration rate of the concrete in the latter period.The stress ratio increases from 0 to 25%, the failure time of the concrete decreases 15%;and the failure time decreases between 25% and 35% when the stress ratio increases from 25% to 50%.In addition, sulfate corrosion products of concrete are studied by SEM(scanning electron microscopy), EDS(energy disperse spectroscopy)and XRD(X-ray diffraction).

References:

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Memo

Memo:
Biographies: Jin Zuquan(1977—), male, doctor, associate professor, jinzuquan@sohu.com;Sun Wei(1935—), female, professor, the academician of Chinese Academy of Engineering, sunwei@seu.edu.cn.
Foundation items: The National High Technology Research and Development Program of China(863 Program)(No.2003AA33X100), the National Natural Science Foundation of China(No.50708046, 50739001).
Citation: Jin Zuquan, Sun Wei, Jiang Jinyang, et al.Damage of concrete attacked by sulfate and sustained loading[J].Journal of Southeast University(English Edition), 2008, 24(1):69-73.
Last Update: 2008-03-20